Glasses containing alcoholic drinks sometimes form frost on the outside. How does this happen? Evaluate the following statements.
Statement I: Alcohol leaks through intact glass and becomes ice.
Statement II: Water vapour from the surrounding air deposits directly as frost on a sufficiently cold glass surface.

Question

Glasses containing alcoholic drinks sometimes form frost on the outside. How does this happen? Evaluate the following statements.

Statement I: Alcohol leaks through intact glass and becomes ice.

Statement II: Water vapour from the surrounding air deposits directly as frost on a sufficiently cold glass surface.

TestHub · Accepted Answer

A very cold drink (for example served with ice or from a freezer) cools the glass wall below 0°C. Water vapour in the surrounding air meets the cold surface, condenses and freezes (or deposits directly as ice), forming frost. Alcohol lowers the freezing point of the drink so it can be colder than 0°C without freezing. Statement I is false and Statement II true. Correct option: (C).

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